Allow your players to get access to some Feather Tokens or a similar item.
As already pointed out in previous answers (mainly [here][1, here, here and here) as it is written this spell seems to be unbalanced, given its level, duration and material cost.
As Dale M suggests in their answeranswer, you can manage to substitute your spell with a magic item: see for example the Feather Token (Swan Boat):
This tiny object looks like a feather.
You can use an action to touch the token to a body of water at least 60 feet in diameter. The token disappears, and a 50-foot-long, 20-foot- wide boat shaped like a swan takes its place. The boat is self-propelled and moves across water at a speed of 6 miles per hour. You can use an action while on the boat to command it to move or to turn up to 90 degrees. The boat can carry up to thirty-two Medium or smaller creatures. A Large creature counts as four Medium creatures, while a Huge creature counts as nine. The boat remains for 24 hours and then disappears. You can dismiss the boat as an action.
The boat created in this way lasts 24 hours and it does not come with any crew: you may use this Feather Token as a starting point to create your magic item, changing for example its duration, its looking or whatever detail should fit with your campaign.
As Thomas suggests in their answer, you may create a side quest for making your players come in possession of such item.